openstack/kayobe
Code Issues Proposed changes

CentOS 8: Disable ntpd, enable chrony container

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CentOS 8 does not provide an ntp package. Instead fall back to using the
chrony container provided by Kolla Ansible by default.

Depends-On: https://review.opendev.org/711511

Change-Id: If5230854d7565c8b3c91a46da4795c63edf095e4
Story: 2006574
Task: 38866
This commit is contained in:
Mark Goddard 2020-02-25 15:54:04 +00:00
parent ebd5aa4477
commit 71d36cbe5e
6 changed files with 40 additions and 13 deletions
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8
ansible/group_vars/all/kolla
View File

@ -348,9 +348,11 @@ kolla_enable_blazar: "no"
kolla_enable_central_logging: "no"
kolla_enable_ceph: "no"
kolla_enable_ceilometer: "no"
# The chrony container is disabled by default because we enable an NTP daemon
# on the host. Setting this to true will disable NTP on the host.
kolla_enable_chrony: "no"
# The chrony container is disabled by default on CentOS 7 because we enable an
# NTP daemon on the host. On CentOS 8 the chrony container is enabled by
# default because the NTP daemon is not supported. Setting this to true will
# disable NTP on the host.
kolla_enable_chrony: "{{ ansible_os_family != 'RedHat' or ansible_distribution_major_version | int >= 8 }}"
kolla_enable_cinder: "no"
kolla_enable_cloudkitty: "no"
kolla_enable_collectd: "no"

11
ansible/group_vars/all/ntp
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@ -10,9 +10,14 @@ timezone: "{{ ansible_date_time.tz }}"
###############################################################################
# Network Time Protocol (NTP).
# Whether to enable the NTP daemon on the host. Default is true unless
# 'kolla_enable_chrony' has been set to true on overcloud hosts.
ntp_service_enabled: "{{ 'overcloud' not in group_names or not kolla_enable_chrony | bool }}"
# Whether to enable the NTP daemon on the host. On CentOS 7 the default is true
# unless 'kolla_enable_chrony' has been set to true on overcloud hosts. On
# CentOS 8 the host NTP daemon is not supported, and kolla_enable_chrony is set
# to true by default.
ntp_service_enabled: >-
{{ ansible_os_family == 'RedHat' and
ansible_distribution_major_version | int == 7 and
('overcloud' not in group_names or not kolla_enable_chrony | bool) }}
ntp_package_state: "{{ 'present' if ntp_service_enabled | bool else 'absent' }}"
ntp_service_state: "{{ 'started' if ntp_service_enabled | bool else 'stopped' }}"

14
doc/source/configuration/hosts.rst
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@ -363,6 +363,11 @@ NTP
*tags:*
| ``ntp``
.. note::
CentOS 8 does not support configuring an NTP daemon. Use :ref:`chrony
<configuration-hosts-chrony>` instead.
Network Time Protocol (NTP) may be configured via variables in
``${KAYOBE_CONFIG_PATH}/ntp.yml``. The list of NTP servers is
configured via ``ntp_config_server``, and by default the ``pool.ntp.org``
@ -391,14 +396,17 @@ The NTP service may be disabled as follows:
ntp_service_enabled: false
.. _configuration-hosts-chrony:
Chrony
------
Kolla Ansible can deploy a chrony container. This is disabled by default in
Kayobe to avoid conflicting with the NTP daemon on the host.
Kayobe on CentOS 7 to avoid conflicting with the NTP daemon on the host. On
CentOS 8 Chrony is enabled by default.
To use the containerised chrony daemon and disable the host NTP daemon, set the
following in ``${KAYOBE_CONFIG_PATH}/kolla.yml``:
To use the containerised chrony daemon and disable the host NTP daemon on
CentOS 7, set the following in ``${KAYOBE_CONFIG_PATH}/kolla.yml``:
.. code-block:: yaml

6
etc/kayobe/kolla.yml
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@ -185,8 +185,10 @@
#kolla_enable_ceph_mds:
#kolla_enable_ceph_nfs:
#kolla_enable_ceph_rgw:
# The chrony container is disabled by default because we enable an NTP daemon
# on the host. Setting this to true will disable NTP on the host.
# The chrony container is disabled by default on CentOS 7 because we enable an
# NTP daemon on the host. On CentOS 8 the chrony container is enabled by
# default because the NTP daemon is not supported. Setting this to true will
# disable NTP on the host.
#kolla_enable_chrony:
#kolla_enable_cinder:
#kolla_enable_cinder_backend_hnas_iscsi:

6
etc/kayobe/ntp.yml
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@ -10,8 +10,10 @@
###############################################################################
# Network Time Protocol (NTP).
# Whether to enable the NTP daemon on the host. Default is true unless
# 'kolla_enable_chrony' has been set to true on overcloud hosts.
# Whether to enable the NTP daemon on the host. On CentOS 7 the default is true
# unless 'kolla_enable_chrony' has been set to true on overcloud hosts. On
# CentOS 8 the host NTP daemon is not supported, and kolla_enable_chrony is set
# to true by default.
#ntp_service_enabled:
# List of names of NTP servers.

8
releasenotes/notes/centos-8-chrony-bec9d7bc8b346363.yaml Normal file
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@ -0,0 +1,8 @@
---
upgrade:
- |
Support for configuring an NTP daemon on the seed and overcloud hosts is no
longer present for CentOS 8, as appropriate packages are not available.
Instead, Kolla Ansible is configured to deploy the ``chrony`` container on
overcloud hosts by default. This may be disabled by setting
``kolla_enable_chrony`` to ``false``.